Please support a reputable local sewing machine dealer. A good shop will most likely have some good trade ins that have been checked over and serviced; and will stand by your purchase. If people don't shop locally for sewing needs, it won't be long before the shops will be even fewer and further between than they are now. You might also give her a gift certificate at a good shop because after Christmas they will have plenty of trade ins.
I also bought my daughter a nice Janome Jem from a dealer a few Christmases ago for a great price, she got as many free lessons as she needed to learn the machine. Later on if she wants another machine, she can trade it in or sell it privately and has a built in relationship with a trustworthy dealer. You get what you pay for, and any machine under $200 would be a mistake imho, unless it is a pre-loved good brand: Janome, Pfaff, and the better Brother machines; also Viking or Babylock. (Kenmores used to be made by Janome, not sure about them now tho.)